Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control
<p>Wake redirection is an active wake control (AWC) concept that is known to have a high potential for increasing the overall power production of wind farms. Being based on operating the turbines with intentional yaw misalignment to steer wakes away from downstream turbines, this control strat...
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Series: | Wind Energy Science |
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doaj-3d384d9091864fb49a2aa8d460ae48f02020-11-25T01:18:41ZengCopernicus PublicationsWind Energy Science2366-74432366-74512019-10-01454956110.5194/wes-4-549-2019Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake controlH. Mendez Reyes0S. Kanev1B. Doekemeijer2J.-W. van Wingerden3TNO, ECN-TNO, Westerduinweg 3, 1755 LE Petten, the NetherlandsTNO, ECN-TNO, Westerduinweg 3, 1755 LE Petten, the NetherlandsTU Delft, DCSC, Mekelweg 2, 2628 CD Delft, the NetherlandsTU Delft, DCSC, Mekelweg 2, 2628 CD Delft, the Netherlands<p>Wake redirection is an active wake control (AWC) concept that is known to have a high potential for increasing the overall power production of wind farms. Being based on operating the turbines with intentional yaw misalignment to steer wakes away from downstream turbines, this control strategy requires careful attention to the load implications. However, the computational effort required to perform an exhaustive analysis of the site-specific loads on each turbine in a wind farm is unacceptably high due to the huge number of aeroelastic simulations required to cover all possible inflow and yaw conditions. To reduce this complexity, a practical load modeling approach is based on “gridding”, i.e., performing simulations only for a subset of the range of environmental and operational conditions that can occur. Based on these simulations, a multi-dimensional lookup table (LUT) can be constructed containing the fatigue and extreme loads on all components of interest. Using interpolation, the loads on each turbine in the farm can the be predicted for the whole range of expected conditions. Recent studies using this approach indicate that wake redirection can increase the overall power production of the wind farm and at the same time decrease the lifetime fatigue loads on the main components of the individual turbines. As the present level of risk perception related to operation with large yaw misalignment is still substantial, it is essential to increase the confidence level in this LUT-based load modeling approach to further derisk the wake redirection strategy. To this end, this paper presents the results of a series of studies focused on the validation of different aspects of the LUT load modeling approach. These studies are based on detailed aeroelastic simulations, two wind tunnel tests, and a full-scale field test. The results indicate that the LUT approach is a computationally efficient methodology for assessing the farm loads under AWC, which achieves generally good prediction of the load trends.</p>https://www.wind-energ-sci.net/4/549/2019/wes-4-549-2019.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
H. Mendez Reyes S. Kanev B. Doekemeijer J.-W. van Wingerden |
spellingShingle |
H. Mendez Reyes S. Kanev B. Doekemeijer J.-W. van Wingerden Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control Wind Energy Science |
author_facet |
H. Mendez Reyes S. Kanev B. Doekemeijer J.-W. van Wingerden |
author_sort |
H. Mendez Reyes |
title |
Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control |
title_short |
Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control |
title_full |
Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control |
title_fullStr |
Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control |
title_full_unstemmed |
Validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control |
title_sort |
validation of a lookup-table approach to modeling turbine fatigue loads in wind farms under active wake control |
publisher |
Copernicus Publications |
series |
Wind Energy Science |
issn |
2366-7443 2366-7451 |
publishDate |
2019-10-01 |
description |
<p>Wake redirection is an active wake control (AWC) concept that is known to have a high potential for increasing the overall power production of wind farms. Being based on operating the turbines with intentional yaw misalignment to steer wakes away from downstream turbines, this control strategy requires careful attention to the load implications. However, the computational effort required to perform an exhaustive analysis of the site-specific loads on each turbine in a wind farm is unacceptably high due to the huge number of aeroelastic simulations required to cover all possible inflow and yaw conditions. To reduce this complexity, a practical load modeling approach is based on “gridding”, i.e., performing simulations only for a subset of the range of environmental and operational conditions that can occur. Based on these simulations, a multi-dimensional lookup table (LUT) can be constructed containing the fatigue and extreme loads on all components of interest. Using interpolation, the loads on each turbine in the farm can the be predicted for the whole range of expected conditions. Recent studies using this approach indicate that wake redirection can increase the overall power production of the wind farm and at the same time decrease the lifetime fatigue loads on the main components of the individual turbines. As the present level of risk perception related to operation with large yaw misalignment is still substantial, it is essential to increase the confidence level in this LUT-based load modeling approach to further derisk the wake redirection strategy. To this end, this paper presents the results of a series of studies focused on the validation of different aspects of the LUT load modeling approach. These studies are based on detailed aeroelastic simulations, two wind tunnel tests, and a full-scale field test. The results indicate that the LUT approach is a computationally efficient methodology for assessing the farm loads under AWC, which achieves generally good prediction of the load trends.</p> |
url |
https://www.wind-energ-sci.net/4/549/2019/wes-4-549-2019.pdf |
work_keys_str_mv |
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